I'm going to break down and take a depthfinder for my next QP trip.  Got any advice on makes?  I'm looking for a depthfinder designed specifically for wilderness canoeing/portaging, if there is such a thing. 

I know, this topic has been covered in numerous past threads.  I did my due diligence and searched on "depthfinder" and read a lot of chat about depthfinders.  But I'm looking for specific brands and models.  I'd like to get a good one, and will pay whatever it takes. 

Thanks in advance for your advice!

prouboy